What it is and what it does
The Siemens SENTRON 5SL3563-7 is a 1-pole + neutral miniature circuit breaker (MCB) with a C tripping characteristic, rated 63 A at 30 °C and 230 V AC. It provides overcurrent and short-circuit protection in residential and infrastructure distribution boards, with a breaking capacity of 4.5 kA per EN 60898 and IEC 60947-2. The C-curve means it trips between 5 and 10 times rated current — suited for circuits with moderate inrush, like lighting banks or small motor loads.
Key ratings and what they mean for fit
The 63 A rating holds at 30 °C ambient; at 40 °C it derates to 59.18 A, at 45 °C to 57.96 A, and at 55 °C to 52.93 A. If your panel runs warm (common in crowded enclosures), you need to account for that derating — the 63 A label is the 30 °C figure, not the installed capacity. The 4.5 kA breaking capacity applies to both EN 60898 (household) and IEC 60947-2 (industrial) standards, so the same part works for residential boards and light industrial sub-distribution. Overvoltage category III and pollution degree 2 mean it's rated for fixed-installation mains supply, not for outdoor or wet locations.
Integration and mounting notes
Snaps onto standard 35 mm DIN rail. It occupies 2 modular width units (36 mm total width). The 76 mm depth and 70 mm installation depth fit standard distribution enclosures; no special clearance needed beyond the usual front-access wiring space. Neutral conductor is switched internally (1P+N design), so you don't need a separate neutral bar for the protected circuit. Any mounting position is allowed, which simplifies panel layout.
Environmental and compliance details
Halogen-free and silicon-free construction — relevant for installations in sensitive environments like hospitals or data centers where corrosive off-gassing during a fault must be minimized. Sealable terminals allow the installer to lock the cover after commissioning, preventing tampering. Touch protection is built in. Operating temperature range spans -40 °C to 75 °C, covering heated indoor panels and unheated outdoor cabinets alike.